A 1998 Legislative Reference Bureau Study (Ohana Zoning: a 5-Year Review) said it best:
"Ohana Zoning, while blamed for some infrastructure problems, is one useful safety valve that takes care of some housing needs. The blame associated with ohana, such as increased on-street traffic and consequent decreased road capacity, is merely a symptom of the general overcrowding. If affordable, legal housing is not available, people will create and live in illegal units. Legalizing ohana zoning at least allows some element of governmental control over building standards and infrastructure requirements, and brings a small amount of revenue back into the system for water [and sewer] improvements." (pg 39-40)